[Wasm] Imporove external interface support

* Support boxing/unboxing when casting to Any
* Support ===, equals, hashCode, toString

* Support adapting String in interop boundary

js/js.tests/test/org/jetbrains/kotlin/js/test/BasicWasmBoxTest.kt

@@ -195,7 +195,7 @@ abstract class BasicWasmBoxTest(
             
             wasmInstance.exports.startUnitTests?.();
 
-            const actualResult = importStringFromWasm(wasmInstance.exports.$testFunction());
+            const actualResult = wasmInstance.exports.$testFunction();
             if (actualResult !== "OK")
                 throw `Wrong box result '${'$'}{actualResult}'; Expected "OK"`;
         """.trimIndent()

js/js.tests/test/org/jetbrains/kotlin/js/test/ir/semantics/abstractClassesForGeneratedIrTests.kt

@@ -23,3 +23,9 @@ abstract class AbstractIrJsCodegenInlineTest : BasicIrBoxTest(
     "compiler/testData/codegen/boxInline/",
     "codegen/irBoxInline/"
 )
+
+
+abstract class AbstractIrCodegenWasmJsInteropJsTest : BasicIrBoxTest(
+    "compiler/testData/codegen/wasmJsInterop",
+    "codegen/wasmJsInteropJs"
+)

js/js.tests/test/org/jetbrains/kotlin/js/test/semantics/abstractClassesForGeneratedTests.kt

@@ -24,11 +24,6 @@ abstract class AbstractJsCodegenInlineTest : BasicBoxTest(
     "codegen/boxInline"
 )
 
-abstract class AbstractIrCodegenWasmJsInteropJsTest : BasicBoxTest(
-    "compiler/testData/codegen/wasmJsInterop",
-    "codegen/wasmJsInteropWasm"
-)
-
 
 abstract class AbstractJsLegacyPrimitiveArraysBoxTest : BasicBoxTest(
     "compiler/testData/codegen/box/arrays/",

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/ir/semantics/IrCodegenWasmJsInteropJsTestGenerated.java

@@ -3,7 +3,7 @@
  * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
  */
 
-package org.jetbrains.kotlin.js.test.semantics;
+package org.jetbrains.kotlin.js.test.ir.semantics;
 
 import com.intellij.testFramework.TestDataPath;
 import org.jetbrains.kotlin.test.JUnit3RunnerWithInners;
@@ -30,6 +30,11 @@ public class IrCodegenWasmJsInteropJsTestGenerated extends AbstractIrCodegenWasm
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxWasmJsInterop"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.JS_IR, true);
     }
 
+    @TestMetadata("externalTypeOperators.kt")
+    public void testExternalTypeOperators() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/externalTypeOperators.kt");
+    }
+
     @TestMetadata("externals.kt")
     public void testExternals() throws Exception {
         runTest("compiler/testData/codegen/boxWasmJsInterop/externals.kt");
@@ -39,4 +44,9 @@ public class IrCodegenWasmJsInteropJsTestGenerated extends AbstractIrCodegenWasm
     public void testJsExport() throws Exception {
         runTest("compiler/testData/codegen/boxWasmJsInterop/jsExport.kt");
     }
+
+    @TestMetadata("types.kt")
+    public void testTypes() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/types.kt");
+    }
 }

js/js.tests/tests-gen/org/jetbrains/kotlin/js/test/wasm/semantics/IrCodegenWasmJsInteropWasmTestGenerated.java

@@ -30,6 +30,11 @@ public class IrCodegenWasmJsInteropWasmTestGenerated extends AbstractIrCodegenWa
         KtTestUtil.assertAllTestsPresentByMetadataWithExcluded(this.getClass(), new File("compiler/testData/codegen/boxWasmJsInterop"), Pattern.compile("^(.+)\\.kt$"), null, TargetBackend.WASM, true);
     }
 
+    @TestMetadata("externalTypeOperators.kt")
+    public void testExternalTypeOperators() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/externalTypeOperators.kt");
+    }
+
     @TestMetadata("externals.kt")
     public void testExternals() throws Exception {
         runTest("compiler/testData/codegen/boxWasmJsInterop/externals.kt");
@@ -39,4 +44,14 @@ public class IrCodegenWasmJsInteropWasmTestGenerated extends AbstractIrCodegenWa
     public void testJsExport() throws Exception {
         runTest("compiler/testData/codegen/boxWasmJsInterop/jsExport.kt");
     }
+
+    @TestMetadata("nullableExternRefs.kt")
+    public void testNullableExternRefs() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/nullableExternRefs.kt");
+    }
+
+    @TestMetadata("types.kt")
+    public void testTypes() throws Exception {
+        runTest("compiler/testData/codegen/boxWasmJsInterop/types.kt");
+    }
 }